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‘希尔’核桃树的雌花败育率高达90％。如果在休眠期疏除树上的雄花芽,那么将增加雌花的座果率。雌花败育的重要原因是树体营养缺乏,核桃树春季的生长和结果很大程度上取决于上年贮存于多年生组织器官内 C 和 N 化合物的重新分配及利用。本研究的重点是测定雌花败育与木质部树液中贮藏的 C、N 物质重新分配动态的关系。另外,通过控制施 N 肥来评估 C、N 关系及 N 缺乏对雌花败育的影响。研究结果表明:雄先型核桃品种‘希
’Hill’ Walnut tree female flower abortion rate as high as 90%. If the tree in the dormancy to sparse male flower buds, it will increase the rate of female flower cones. The main reason for female abortion is the lack of tree nutrition. The growth and the results of walnut tree in spring depend largely on the redistribution and utilization of C and N compounds stored in perennial tissues and organs in the previous year. The focus of this study was to determine the relationship between female abortion and the redistribution of C and N substances stored in the xylem sap. In addition, the effects of C, N and N deficiency on female abortion were assessed by controlling application of N fertilizers. The results show that: male first type walnut varieties’ Greek